Olds was frequently at odds with senior leaders, and had his ways of defying the establishment—most famously (or infamously), the decidedly out-of-regs, heavily waxed handlebar mustache he sported in Vietnam.

Thus, “maverick” fighter pilots continue the “rebellion” in a tradition every year:

This is thought to have given rise to the Mustache March tradition, where Air Force men stand in symbolic solidarity to good-naturedly “protest” Air Force facial hair regulations, which state that, “Mustaches will not extend downward beyond the lip-line of the upper lip or extend sideways beyond a vertical line drawn upward from the corner of the mouth.” (From Air Force Instruction 36-2903.)